Recycling system

Abstract

The utility model relates to the technical field of drying, in particular to a recycling system which comprises drying equipment, the drying equipment comprises a shell, a jacket structure, a stirring structure and a coil pipe, the jacket structure is arranged on the outer side of the shell in a sleeving mode, a first space is defined between the jacket structure and the outer wall of the shell, and the first space is not communicated with a second space in the shell; a water injection port is formed in the jacket structure and is used for injecting cooling water into the first space; the stirring structure is of a hollow structure, and the hollow structure is filled with a first heating medium; the coil pipe is arranged on the outer wall of the jacket structure, and a second heating medium is contained in the coil pipe so as to heat the materials in the shell. According to the design, cooling water is injected into the first space through the water injection opening, the cooling speed of the solid waste is increased, the quality of the solid waste is not increased, and the cooling efficiency is improved; in addition, the materials in the shell are jointly heated through the stirring structure and the coil pipe, the heating efficiency is improved, and even heating is achieved.

Description

Technical Field

[0001] This application relates to the field of drying technology, and more particularly to a recycling system. Background Technology

[0002] The production of carbon fiber generates waste liquid containing a large amount of dimethyl sulfoxide, which needs to be recycled and reused as a raw material for the production of carbon fiber.

[0003] In the current recycling system, after the high temperature and high pressure vacuum environment in the drying equipment vaporizes dimethyl sulfoxide into gas and discharges it, the remaining solid waste is usually collected and cleaned up after natural cooling in the drying equipment. The cooling efficiency is low and the collection is difficult, resulting in a waste of time. In addition, the heating efficiency also needs to be improved. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a recovery system that improves both cooling and heating efficiency.

[0005] According to some embodiments, this application provides a recycling system including a drying device, the drying device comprising:

[0006] case;

[0007] A jacket structure is fitted onto the outside of the housing, and the jacket structure and the outer wall of the housing enclose a first space. The first space is not connected to a second space inside the housing. A water inlet is provided on the jacket structure for injecting cooling water into the first space.

[0008] A stirring structure, wherein the stirring structure is a hollow structure and the hollow structure is filled with a first heating medium;

[0009] A coil is disposed on the outer wall of the jacket structure, and the coil is filled with a second heating medium to heat the material inside the shell.

[0010] In some embodiments of this application, the housing is a cylindrical structure, and the axis of the housing extends in the horizontal direction;

[0011] The stirring structure includes a rotating shaft and multiple rake teeth. The rotating shaft is arranged along the axis of the shell. The first ends of the multiple rake teeth are fixed to the rotating shaft, and the second ends of the multiple rake teeth are radially arranged inside the shell and contact the inner surface of the shell.

[0012] In some embodiments of this application, the rake teeth include a connecting rod and a scraper. The first end of the connecting rod is fixedly connected to the rotating shaft, and the second end of the connecting rod is connected to the scraper. The scraper contacts the inner surface of the housing. The rotating shaft, the connecting rod, and the scraper are all hollow structures, and the interior of the rake teeth is connected to the interior of the rotating shaft.

[0013] In some embodiments of this application, the stirring structure further includes a pipe arranged within the rotating shaft, the connecting rod, and the scraper to form a circulation loop, and the pipe is filled with the first heating medium.

[0014] In some embodiments of this application, the first end of the rotating shaft is a closed end and is connected to a motor, which drives the rotating shaft to rotate; the second end of the rotating shaft is an open end, and the pipe extends into and out of the stirring structure from the second end.

[0015] In some embodiments of this application, the jacket structure is further provided with a first inlet, a first outlet, and a drain outlet.

[0016] The first inlet is connected to a steam generating device for introducing steam into the first space, the first outlet is connected to a first pump body for discharging the steam from the first space, and the drain outlet is located at the bottom of the jacket structure for discharging the cooling water from the first space.

[0017] In some embodiments of this application, the shell is provided with a material inlet and a slag discharge outlet, wherein the material inlet is located at the top of the shell and is connected to a material conveying pipeline, a second pump body is provided on the material conveying pipeline, and the slag discharge outlet is located at the bottom of the shell.

[0018] In some embodiments of this application, a gas collection port is provided on the housing, and the gas collection port is connected to the first end of a gas collection pipe.

[0019] In some embodiments of this application, the recovery system further includes a condensation device connected to the second end of the gas collection pipe, the condensation device being used to liquefy the gaseous material conveyed in the drying equipment into a liquid material.

[0020] In some embodiments of this application, the recycling system further includes a collection device connected to the condensation device, the collection device being used to collect the liquid material.

[0021] The recycling system provided in this application can achieve the following beneficial technical effects:

[0022] The recycling system provided in this application has a water inlet on the jacket structure. Cooling water is injected into the first space through the water inlet, which not only accelerates the cooling speed of solid waste but also does not increase the mass of solid waste, thus improving cooling efficiency. In addition, the stirring structure is a hollow structure. By setting the stirring structure filled with the first heating medium and the coil on the outer wall of the jacket structure, the stirring structure and the coil together heat the material in the shell, improving heating efficiency and achieving uniform heating. Both heating efficiency and cooling efficiency are improved. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the present application, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0024] Figure 1 This is a schematic diagram of the structure of a drying device shown in one embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the structure of a recycling system shown in one embodiment of this application.

[0026] Figure label:

[0027] 100. Drying equipment; 110. Shell; 1110. Material inlet; 1120. Slag discharge port; 1130. Gas collection port; 1140. Vacuum port; 120. Jacket structure; 1210. Water inlet; 1220. Drainage port; 1230. First inlet; 1240. First outlet; 130. Stirring structure; 1310. Rotating shaft; 1320. Rake teeth; 1321. Connecting rod; 1322. Scraper; 1330. Pipeline; 140. Motor; 150. Base;

[0028] 200. Material conveying pipeline; 210. Second pump body;

[0029] 300. Gas collection pipeline;

[0030] 400. Water injection pipeline; 410. Third pump body;

[0031] 500. Condensation equipment; 510. Cooling pipes;

[0032] 600. Collection equipment. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0034] The production of carbon fiber generates waste liquid containing a large amount of dimethyl sulfoxide (DMSO), which needs to be recycled for reuse as a raw material in carbon fiber production. In current recycling systems, the high-temperature, high-pressure vacuum environment in the drying equipment vaporizes the DMSO into gas and discharges it. The remaining solid waste is usually collected and cleaned after natural cooling in the drying equipment. This process is inefficient, difficult to collect, and time-consuming. Furthermore, the heating efficiency of current recycling systems needs improvement.

[0035] To address the aforementioned issues, this application provides a recycling system with a water inlet in the jacket structure. Cooling water is injected into the first space through the water inlet, which accelerates the cooling rate of solid waste without increasing its mass, thus improving cooling efficiency. In addition, the stirring structure is hollow. By incorporating a stirring structure filled with a first heating medium and a coil on the outer wall of the jacket structure, the stirring structure and the coil work together to heat the material inside the shell, improving heating efficiency and achieving uniform heating. Both heating and cooling efficiencies are improved.

[0036] The recycling system provided in accordance with this application will now be described in detail with reference to the accompanying drawings.

[0037] Figure 1 The x-axis direction is the horizontal direction, which is also the axial direction of the shell 110. Figure 1 The y-axis direction is the vertical direction.

[0038] An exemplary embodiment of this application provides a recycling system, which includes a drying device 100, such as... Figure 1As shown, the drying equipment 100 includes a shell 110, a jacket structure 120, a stirring structure 130, and a coil. The jacket structure 120 is fitted onto the outside of the shell 110 and forms a first space with the outer wall of the shell 110. The first space is not connected to a second space inside the shell 110. A water inlet 1210 is provided on the jacket structure 120, and cooling water is injected into the first space through the water inlet 1210 to cool the remaining solid waste inside the shell 110. The stirring structure 130 is a hollow structure and is filled with a first heating medium. The coil is disposed on the outer wall of the jacket structure 120 and contains a second heating medium. The stirring structure 130 and the coil together heat the material inside the shell 110.

[0039] The recycling system in this embodiment operates as follows: a first heating medium is introduced into the stirring structure 130, and a second heating medium is introduced into the coil. The stirring structure 130 heats the material in the shell 110 while stirring it. Heating is stopped once the material to be recycled has fully vaporized, i.e., when it has completely turned into dry powder. Cooling water is then introduced into the first space through the water inlet 1210 to rapidly cool the solid waste inside the shell 110.

[0040] In this embodiment, by opening a water inlet 1210 on the jacket structure 120, cooling water is injected into the first space through the water inlet 1210, which not only accelerates the cooling speed of the solid waste but also does not increase the mass of the solid waste, thus improving the cooling efficiency. In addition, the stirring structure 130 is a hollow structure. By setting the stirring structure 130 filled with the first heating medium and the coil on the outer wall of the jacket structure 120, the stirring structure 130 and the coil together heat the material in the shell 110, which improves the heating efficiency and achieves uniform heating. Both heating efficiency and cooling efficiency are improved.

[0041] It should be noted that the first heating medium in this embodiment is, for example, saturated steam or high-pressure superheated steam, and the second heating medium is, for example, heat transfer oil. When selecting a heating medium, factors such as reaction temperature, pressure, material properties, safety, heat transfer efficiency, and operating cost need to be considered. Those skilled in the art can select according to the actual situation, and no specific limitation is made here.

[0042] In some embodiments, such as Figure 1 and Figure 2 As shown, the water inlet 1210 is connected to the water inlet pipe 400, and a third pump body 410 is installed on the water inlet pipe 400. The third pump body 410 is used to pump cooling water into the jacket structure 120. A current sensor is installed on the power line of the motor 140, and the current sensor is electrically connected to the third pump body 410.

[0043] When the material to be recycled is fully vaporized, meaning the remaining material is about to become completely dry powder, the stirring current of the stirring structure 130 will first surge and then suddenly drop. By setting a current sensor, when a large fluctuation in the stirring current is detected, the current sensor sends a signal to the controller, which then controls the third pump 410 to start working, pumping cooling water into the first space through the water inlet 1210 to cool the remaining waste material. This design allows for timely cooling and also saves manpower.

[0044] In some embodiments, continue to refer to Figure 1 The housing 110 is provided with a vacuum port 1140, through which the first space inside the housing 110 is evacuated to a vacuum environment. Before adding materials into the housing 110, and when cooling water is introduced for cooling, the housing 110 is set to a vacuum. In a vacuum environment, the boiling point of the liquid is lowered and the heat transfer coefficient is increased, thereby improving the heat transfer efficiency, which is beneficial to improving the efficiency of heating and cooling.

[0045] In some embodiments, such as Figure 1 As shown, the shell 110 is a cylindrical structure, and the axis of the shell 110 extends in the horizontal direction (i.e., the x-axis direction in the figure); the stirring structure 130 includes a rotating shaft 1310 and a plurality of rake teeth 1320. The rotating shaft 1310 extends along the axis of the shell 110, the first end of the rake teeth 1320 is fixed to the rotating shaft 1310, and the second end of the rake teeth 1320 is radially arranged inside the shell 110 and contacts the inner surface of the shell 110.

[0046] By setting up a stirring structure 130 including a rotating shaft 1310 and multiple rake teeth 1320, and with the rake teeth 1320 in contact with the inner wall of the shell 110, the rake teeth 1320 can fully stir the material in the shell 110 when the rotating shaft 1310 rotates, ensuring uniform heating of the material and thus ensuring the evaporation effect of the material to be recovered.

[0047] In some embodiments, continue to refer to Figure 1 The rake tooth 1320 includes a connecting rod 1321 and a scraper 1322. The first end of the connecting rod 1321 is fixedly connected to the rotating shaft 1310, and the second end of the connecting rod 1321 is connected to the scraper 1322. The scraper 1322 is in contact with the inner surface of the housing 110. The rotating shaft 1310, the connecting rod 1321 and the scraper 1322 are all hollow structures, and the interior of the rake tooth 1320 is connected to the interior of the rotating shaft 1310.

[0048] With this design, the first heating medium can be present in the rotating shaft 1310, the connecting rod 1321, and the scraper 1322. The scraper 1322 is also filled with heating medium, so the material can be heated when the scraper 1322 comes into contact with the material, thus improving the heating efficiency.

[0049] In some embodiments, such as Figure 1 As shown, the stirring structure 130 also includes a pipe 1330, which is arranged within the rotating shaft 1310, connecting rod 1321, and scraper 1322 to form a circulation loop. The pipe 1330 is filled with the first heating medium. Since the first heating medium in the stirring structure 130 gradually cools down during the stirring process, the pipe 1330 forming the circulation loop can continuously introduce hot first heating medium into the pipe 1330, ensuring the heating effect.

[0050] In some embodiments, continue to refer to Figure 1 The two ends of the rotating shaft 1310 are mounted on the housing 110 via bearing seats. The first end of the rotating shaft 1310 is a closed end and is connected to the motor 140. Both the motor 140 and the housing 110 are mounted on the base 150. The motor 140 is used to drive the rotating shaft 1310 to rotate. The second end of the rotating shaft 1310 is an open end, and the pipe 1330 extends into and out of the stirring structure 130 from the second end. This ensures that the rotating shaft 1310 and the rake teeth 1320 can continuously heat the material during rotation.

[0051] In some embodiments, such as Figure 1 As shown, the jacket structure 120 is also provided with a first inlet 1230, a first outlet 1240, and a drain outlet 1220. The first inlet 1230 is connected to a steam generating device for introducing steam into the first space, and the first outlet 1240 is connected to a first pump body for discharging steam from the first space when heating is not required. In this embodiment, the first inlet 1230 is located at the top of the jacket structure 120, and the first outlet 1240 is located at the bottom of the jacket structure 120. In other embodiments, the first inlet 1230 may be located at the bottom of the jacket structure 120, and the first outlet 1240 may be located at the top of the jacket structure 120, or both may be located at the top or bottom of the jacket structure 120, all of which are within the protection scope of this application.

[0052] The jacket structure 120 is also provided with a drain outlet 1220, which is located at the bottom of the jacket structure 120 and is used to drain the cooling water in the first space.

[0053] In this embodiment, by opening a first inlet 1230 and filling it with steam on the jacket structure 120, the jacket structure 120 can achieve a second heating of the material outside of the stirring structure 130 and the coil. After heating, steam is discharged from the first outlet 1240, and then cooling water is introduced into the first space through the water inlet 1210 to cool the waste material. After cooling, the cooling water is discharged through the drain outlet 1220. When heating is needed, steam is filled in again through the first inlet 1230. With this design, the first space enclosed by the jacket structure 120 and the shell 110 can be used for both heating and cooling, realizing the efficient utilization of the jacket structure 120.

[0054] In some embodiments, such as Figure 1 and Figure 2 As shown, the shell 110 has a material inlet 1110 and a slag discharge outlet 1120. The material inlet 1110 is located at the top of the shell 110 and is connected to the material conveying pipe 200. A second pump body 210 is installed on the material conveying pipe 200. The slag discharge outlet 1120 is located at the bottom of the shell 110. Since the shell 110 is connected to the outside environment during waste cleaning and is not a vacuum environment, the waste will fall to the bottom of the shell 110. Placing the slag discharge outlet 1120 at the bottom of the shell 110 facilitates its removal.

[0055] In some embodiments, such as Figure 1 and Figure 2 As shown, a gas collection port 1130 is also provided on the housing 110, and the gas collection port 1130 is connected to the first end of the gas collection pipe 300.

[0056] In some embodiments, such as Figure 2 As shown, the recovery system also includes a condensation device 500, which is connected to the second end of the gas collection pipe 300. The condensation device 500 is used to condense the gaseous material conveyed in the drying device 100 into a liquid material.

[0057] The material to be recycled will be continuously vaporized into gas in the drying equipment 100, and enter the gas collection pipe 300 from the gas collection port 1130. The gas collection pipe 300 will then transport the gas to the condensing equipment 500, where the condensing equipment 500 will condense the gaseous material into liquid material for easy collection.

[0058] In some embodiments, such as Figure 2 As shown, the condensing equipment 500 is equipped with a cooling pipe 510, which is arranged in a spiral shape in the condensing equipment 500. The cooling pipe 510 can contain cooling water or other cooling media. The spiral cooling pipe 510 fully realizes the liquefaction of gaseous materials.

[0059] In some embodiments, continue to refer to Figure 2 The recycling system also includes a collection device 600, which is connected to a condensation device 500. The material to be recycled, which is liquefied in the condensation device 500, is transported to the collection device 600 for collection and reuse.

[0060] The process of using the above-mentioned recycling system to recycle materials is as follows:

[0061] Step 1: Vacuum the second space in the housing 110 through the vacuum port 1140, start the second pump 210, and the material enters the housing 110 through the gas collection pipe 300 and the material inlet 1110.

[0062] Step 2: Introduce the first heating medium into the pipe 1330 of the stirring structure 130, introduce the second heating medium into the coil, and introduce steam into the first space; adjust the gas collection port 1130 to the open state and introduce the cooling medium into the cooling pipe 510; start the motor 140 to drive the rotating shaft 1310 to rotate the rake teeth 1320, and the scraper 1322 continuously scrapes up the material attached to the inner surface of the shell 110 and stirs and heats it; the gaseous material is continuously condensed into liquid by the condensing device 500 and flows into the collection device 600 for storage.

[0063] Step 3: When the stirring current fluctuates significantly, stop heating, discharge the steam in the first space, start the third pump 410 and inject cooling water into the first space through the water inlet 1210.

[0064] Step 4: After cooling is complete, open the drain outlet 1220 to drain the cooling water in the first space, open the slag outlet 1120, and clean out the solid waste for collection and packaging in ton bags.

[0065] The recycling system provided in this application, by opening a water inlet 1210 on the jacket structure 120, injects cooling water into the first space through the water inlet 1210, which not only accelerates the cooling speed of solid waste but also does not increase the mass of solid waste, thus improving cooling efficiency. In addition, the stirring structure 130 is a hollow structure. By setting the stirring structure 130 filled with the first heating medium and the coil on the outer wall of the jacket structure 120, the stirring structure 130 and the coil together heat the material in the shell 110, improving heating efficiency and achieving uniform heating. Both heating efficiency and cooling efficiency are improved, and labor costs are saved, avoiding the risk of fire.

[0066] The above-described contents can be implemented individually or in various combinations, and these variations are all within the scope of protection of this application.

[0067] It should be noted that in the description of this application, the terms "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0071] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A recycling system, characterized in that, The equipment includes a drying device, which comprises: case; A jacket structure is fitted onto the outside of the housing, and the jacket structure and the outer wall of the housing enclose a first space. The first space is not connected to a second space inside the housing. A water inlet is provided on the jacket structure for injecting cooling water into the first space. A stirring structure, wherein the stirring structure is a hollow structure and the hollow structure is filled with a first heating medium; A coil is disposed on the outer wall of the jacket structure, and the coil is filled with a second heating medium to heat the material inside the shell.

2. The recycling system according to claim 1, characterized in that, The shell is a cylindrical structure, and the axis of the shell extends in the horizontal direction; The stirring structure includes a rotating shaft and multiple rake teeth. The rotating shaft is arranged along the axis of the shell. The first ends of the multiple rake teeth are fixed to the rotating shaft, and the second ends of the multiple rake teeth are radially arranged inside the shell and contact the inner surface of the shell.

3. The recycling system according to claim 2, characterized in that, The rake teeth include a connecting rod and a scraper. The first end of the connecting rod is fixedly connected to the rotating shaft, and the second end of the connecting rod is connected to the scraper. The scraper is in contact with the inner surface of the housing. The rotating shaft, the connecting rod, and the scraper are all hollow structures, and the interior of the rake teeth is connected to the interior of the rotating shaft.

4. The recycling system according to claim 3, characterized in that, The stirring structure also includes pipes, which are arranged within the rotating shaft, the connecting rod, and the scraper to form a circulation loop, and the pipes are filled with the first heating medium.

5. The recycling system according to claim 4, characterized in that, The first end of the rotating shaft is a closed end and is connected to a motor, which drives the rotating shaft to rotate; the second end of the rotating shaft is an open end, and the pipe extends into and out of the stirring structure from the second end.

6. The recycling system according to claim 1, characterized in that, The jacket structure is also provided with a first inlet, a first outlet, and a drain outlet. The first inlet is connected to a steam generating device for introducing steam into the first space, the first outlet is connected to a first pump body for discharging the steam from the first space, and the drain outlet is located at the bottom of the jacket structure for discharging the cooling water from the first space.

7. The recycling system according to claim 1, characterized in that, The shell has a material inlet and a slag discharge outlet. The material inlet is located at the top of the shell and is connected to a material conveying pipeline. A second pump body is installed on the material conveying pipeline. The slag discharge outlet is located at the bottom of the shell.

8. The recycling system according to claim 1, characterized in that, The housing has a gas collection port, which is connected to the first end of a gas collection pipe.

9. The recycling system according to claim 8, characterized in that, The recovery system also includes a condensation device, which is connected to the second end of the gas collection pipe. The condensation device is used to liquefy the gaseous material conveyed in the drying equipment into a liquid material.

10. The recycling system according to claim 9, characterized in that, The recycling system also includes a collection device connected to the condensation device, which is used to collect the liquid material.

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